About
Devil’s Den is a 54-foot-deep crystal clear spring within a dry, prehistoric cave. Located in Williston, Florida, it’s a type of underground spring called a karst window.
A karst window occurs when the roof of a cave collapses or erodes away, exposing a subterranean river or stream. It’s essentially a special kind of sinkhole with a “window” to the water within.
Devil’s Den has been privately owned and operated as a scuba diving training and recreational facility since 1993. The pleasant year-around water temperature of 72 degrees allows comfortable diving, winter or summer.
Devil’s Den also boasts ancient rock formations with stalactites and fossil beds that are 33 million years old. Animal fossils dating back to the Pleistocene Age have been discovered in the cave, and are currently on display at The University of Florida’s Museum of Natural History.
On cold winter mornings, steam rises from the cave through a chimney-shaped opening. Early settlers feared the steam to be smoke, naming the place Devil’s Den.
Want to visit but don’t feel like scuba diving? Devil’s Den also has a campground with lots of amenities, including cabins to rent, tent campgrounds and RV parking, a heated swimming pool, and more.
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Know Before You Go
Devil’s Den Spring is only open to scuba divers and snorkelers—not swimmers, casual visitors or children under six years old. No pets or animals are allowed, as the owners have their own pets/animals on the property and do not want confrontations with outside animals.
You must complete an insurance liability waiver upon entering the property, and you must be 18 to sign for yourself. If you are under 18, a parent must be with you to sign.
Reservations are required for snorkeling and night scuba diving. Priority is given to divers; they get first priority.
Snorkeling mask, snorkel, and fins are required, and free diving fins or breath-hold diving is not allowed.
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Published
January 15, 2016
Updated
October 10, 2025
